Stump-puller



(No Model.)

P. ZUBEE.

' STUMP FULLER.

Patented Jan.

WiTN EEES M D is then worked like a ground. If the tripod or derri PETER ZUBEE, OF ASHBURNHAM, MASSACHUSETTS.

STUMP-P-ULLER.

SPECIFICATION forming part of Letters Patent No. 291,262,

dated January 1, 1884.

Application filed ScptemberS, 1883. (No model.)

I 0 all whom, it may concern Be it "known that I, PETER ZUBEE, of Ashburnham, in the county of Worcester and Commonwealth of Massachusetts, have invented a certain new and useful Improvement in Stump- Pullers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

This invention is designed for the extraction of stumps and rocks, and is a reorganization and improvement of the machine patented to A. E. Cummings, No. 216,082, dated June 3, 1879. The defect of this former contrivance is that the action of the lever against the ratchet-bar has a tendency to cause it to bind against the side of the frame opposite to the ratchet-bar, and thereby greatly increase the friction and waste power. In that machine, also, the retaining and lifting pawls acted upon the teeth of the ratchet-bar diagonally, and so the whole of the power was not utilized in useful effect.

- Inthe drawings, Figure 1 is an elevation of the machine on the right side of the lever. Fig. 2 is an elevation upon the left side of the lever. Fig. 3 is a vertical section through the machine. Fig. 4 is a transverse section on the line y y of Fig. 2. Fig. 5 is a transversesection on the line as m of Fig. 2.

In the use of this machine a tripod or other frame is erected over the stump or rock to be pulled, and the loop at the top of the machine is fastened to a chain or other support at the top of this tripod or gin. A chain attached around the stump is made fast around the lower end of the ratchet-bar O, and the lever pump-handle, bringing astrain upon the stump or rock, which gains a little at each motion of the lever, until the stone or stumpis pulled out clear from the 5 this stone or stump may be transported while hanging to the movablederriek, and gradually lowered to the place where it is proper to deposit it. Such a movable derrick or gin would be furnished by a pair of high, strong wheels, with their axle and tongue, such as is employed for the transportation of cannon from place to place in garrison, my instrument being attached to the center of the axle by a chain.

' In the drawings, A is the frame, through the ck be movable,

loop of which the hook or chain fastening the instrument to the derrick, tripod, or other point of support is passed.

B are the cheeks of which the ratchet-bar slides. O is the ratchetbar, arranged within the frame so that its teeth are oppositev to the lever side of the machine, instead of being on the same side as in the Cummings patent referred to. D is the lever to which power is applied. This lever is pivoted to the frame at B, and is attached at its inner end to the link E, which serves to connect the weighted point of the lever with the cross-head block F. This crosshead block fits between the ways B of the frame A, substantially as the cross-head of a steam-engine fits in the cross-head ways. This block is provided upon its upper surface with the spring-pawl G, which moves transversely of the frame, and fits the teeth of the ratchet bar 0, so as to give a comparatively straight lift beneath the teeth when the power end of the lever D is depressed. This construction may be readily understood from Fig. 3. The lever D has attached to it at its weighted end a spring, (1, which is a reversible spring. The end of the spring d engages a notch, e or e, on the side of the spring-pawl F, and, according as it is in the notch c or in the notch c, forces the spring-pawl under the teeth or away from them.

On the side of the ways B f, with which the springtact as it is lifted, so as is a wedgecam, pawl G comes in conto force it in opposi the frame, between tion to the spring against the notches of the ratchet-teeth when it is desired to lower the weight on the end of the ratchetbar O.

A suitable strapping, H, is provided at the bottom of the frame A B, which serves also as a stop to limit the downward movement of the cross-head block F. Near the point y y, which would be situated in an ordinary stumppulling machine about a foot (more orless) above the strap H, there is ping, H H with an interval between for the transverse retaining-pawl I. This pawl has a spring, t, which'draws it toward the ratchet bar when the machine is lifting the rock or stump.

is a lever-linkage, k, provided with a spring,

7c, which connects the lower end of the lever another horizontal strap Upon the side of this'sp'ringpawl' I K with the actuating-lever 1.), so that on the depression of the power-arm of the lever D the spring It will be put in tension, and, when sufficiently strained, overcome the tension of the spring i, which throws the pawl against the teeth of the ratchet-bar The pawl I will thus be drawn away from the ratchetteeth, and this will happen shortly after the pawl G is thrown by contact with the wedge cam f into engagement with the teeth of the ratchet-bar G.

The operation of this machine is as follows: To raise the weightthc .atchet-bar is let down to the proper length. The spring dis putinto engagement with the notch c,so that the springpawl G is forcedtoward the ratchet-bar. The lever D is then manned and worked like a pump-handle. The pawl G shoots under a tooth of the ratchet-bar C, and lifts against the bottom of the tooth until a tooth has lifted past the spring and pawl I, when this springpawl will snap into place and sustain the load, while the lever D makes its back-stroke and sends the cross-head block F and its pawl G back to take hold of another tooth. \Vhen it is desired to lower the load, the spring (I is put in the notch 0, so as to force the pawl G away from engagement with the teeth of the ratchetbar. The lever is now depressed and the block F raised until the end of the pawl G comes in contact with the wedgeshaped cam which drives the pawl G positively into a notch of the ratchet'bar, where it engages an other one of the teeth. The motion of the lever being still continued, tension is made upon the spring 7.1, and the weight of the load is taken off of the pawl 1. Under these circumstances, the tension of the spring]! overcomes the resilience of the spring i and displaces the pawl I from its engagement in the notch of the ratchet-bar G. The power end of the lever D is then raised and the load gradually lowered, so that the pawl I passes the end of the tooth with which it has just been engaged and snaps into the next notch, when the tension of the spring i is greater than the tension of the spring 7;. The load is then lowered until the tooth now engaged by the pawl I rests upon the top of this pawl, when the load will be supported, and a little further motion of the 'lever D in the same direction will bring the of the spring (1 into action and throw power the pawl G away from the ratchet-bar with which it-has j ust been engaged, so that it will be in a position to pass it when the motion ofthe lever is reversed, until it again comes in contact with the wedge-cam f.

The connection between the lever D and the cross-head F, described as a link, E, might, of course, be made by a slotted-yoke connection. or by any other well-known means of convert ing reciprocating rotary motion into a reciprocating rectilinear motion; but I prefer the connecting-rod and crosshead as upon the whole the most simple and easy of constructio'n.-

The lever 1) may he of the first order, as

5 shown, or of the second order, or may he a compound lever, if desired; or any other actuating device which shall transmit reciprocating rectilinear motion to the crosshead may be employed, to which it may be practical to attach the spring-linkage 7: 7."; but I prefer this as the simplest.

Of course, instead of reversing notches or bearings for the fly of the spring (I, as shown, the fiy end may be fixed and the throw reversed by movement of the hub from side to side; but this is a less convenient and more expensive equivalent for what I have described.

I do not claim as my invention the parts, elements, or combinations in the Cummings patent, No. 216,082; but I do claim the peculiar forms, arrangements, and combinations herein shown and described. whereby the vertical ettect of the power is increased and the side-thrust and waste are decreased.

I claim 1. The combination of aratcl1et-bar,G,sliding in the cheeks B of a frame, A, with the ways B and cross-head F, adapted to be automatically engaged with and disengaged from ratchet-bar G, substantially as described.

2. The combination of the reciprocating cross-head F wit-h the transversely acting spring-pawl G, adapted to automatically ongage the notches ot the ratchet-bar G, substantially as described.

3. The combination of the ratchet-bar C, cross-head F, reciprocated parallel to the longitudinal axis of the ratchet-bar G, and reversible spring-pawl G, substantially as described.

et. The combination of the ratchet-bar C, reciprocating cross-head F, spring-pawl G, adjusted to be disengaged by its spring with the wedge-cam f, substantially as described.

.3. The combination of the ratchet-bar C, reciprocating crosshead F, actuating-pawl G, and spring retaining-pawl I, substantially as described.

6. The combination of the ratchet-bar C, cross-head F, spring-pawl G, wedge-cam f, spring-pawl I, and displacing-linkage k, substantially as described.

7. In combination with the pawl 'I, the two opposing springs i and 7;, the spring 13 acting constantly, and the spring k at intervals only, substantially as described.

8. The combination of pawl G, provided with reversing notches or bearings c c, with the reversible spring (I, substantially as and for the purpose described.

9. The combination of the frame A, provided with guiding-cheeks I and ways B, the reciprocating ratchet-bar G, the retainingpawl I in fixed vertical relation with the frame, the movable cross-head F, the spring-pawl G in fixed vertical relation with said cross-head F, and the lever D and link E, for actuating said cross-head, substantially as described.

10. As a machine for the raising and lowering of weights, the organization of a ratchetbar capable of vertical. intermittent reciproca- ITO tion, a vertically-reciprocated cross-head prbof said ratchet-bar by the downward stroke of vided with a spring-pawl capable of adjustthe actuating-lever in the lower half of its 10 ment to engage with or disengage from the throw, substantially as described.

teeth of the ratchet-bar byrthe action of its 5 spring, and means to positively engage said PETER ZUBEE pawl with said teeth in opposition to its Witnesses: spring, and-a spring retaining-pawl adapted H. G. HOWARD,

to be automatically disengaged from the teeth J. A. WILK1Ns. 

